HELP! * GREEN=global GREY=local Global HTML version of Foils prepared December 2,95

Foil 54 Role of Caching in the Virtual University -- III

From Technologies and Issues for Virtual University HPDC95/SC95 Tutorials -- August 1/Dec 4 1995. by Geoffrey C. Fox * See also color IMAGE
We will need caching anyway for both the Global University and indeed general hierarchical Web Server/ InfoVision scenario
Comparison with InfoVision and the Entertainment Analogy:
Suppose Jurassic Park VI is released on the Hollywood NII Server
Without Caching -- perhaps 20 million people will videodial Hollywood to get their simultaneous showings at 1.5 megabits/second each
  • Need Cross-section bandwidth across the US of about 15,000 gigabits/sec
With Caching, average person will find new movie cached on local server only a few optical fiber miles away. Will reduce needed bandwidth by about a factor of 100 as must travel about 15 miles not 1500 miles to get movie.
Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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